51011641545 has 16 divisors (see below), whose sum is σ = 81621637440. Its totient is φ = 27205205184.

The previous prime is 51011641517. The next prime is 51011641547. The reversal of 51011641545 is 54514611015.

It is not a de Polignac number, because 51011641545 - 2¹³ = 51011633353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51011641547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551367 + ... + 637203.

It is an arithmetic number, because the mean of its divisors is an integer number (5101352340).

Almost surely, 2^51011641545 is an apocalyptic number.

It is an amenable number.

51011641545 is a deficient number, since it is larger than the sum of its proper divisors (30609995895).

51011641545 is a wasteful number, since it uses less digits than its factorization.

51011641545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125464.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 51011641545 in words is "fifty-one billion, eleven million, six hundred forty-one thousand, five hundred forty-five".